1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Over [174]
3 years ago
6

BIOLOGY STUDENTS, I NEED UR HELP.. Substances transported in the phloem are carried upwards in the stem at some time of the year

and downwards at other times. Explain why substances are transported in the phloem upwards at one time of the year and downwards at another. *
Biology
1 answer:
Alja [10]3 years ago
8 0
During growing season when the plant photosynthesises (spring and summer) they travel down to the roots to be stored.
they go upwards when photosynthesis doesn’t occur (winter) to provide nutrients and cellular energy to parts like the leaves.

hope this is what you needed!!
You might be interested in
Some bacteria live in deep sea vents where no light penetrates, yet are still capable of producing their own reduced carbon (e.g
maksim [4K]
Answer:  "chemoautotrophs" .
_________________________________________
5 0
3 years ago
How do organic compounds differ from inorganic compounds?
Dennis_Churaev [7]

All the organic compound differs from inorganic compound by carbon composition.

Answer: Option A

<u>Explanation:</u>

An organic compound is a compound which is composed of one carbon particles binded with different components. Most generally, these carbon molecules are clung to hydrogen, oxygen and nitrogen particles. On the other hand,  an inorganic compound is not basically made out of carbon molecules.

There can be either carbon atoms present or missing. Thus it can be inferred that the presence and absence of carbon determines whether a compound is inorganic or organic.

6 0
3 years ago
Need help with lining up mutated DNA sequence
sergejj [24]
This particular area of genetics can be quite complex. So basically in DNA their is adenine, cytosine, guanine, thymine. So, then there is another step to this: Adenine links with Thymine (A is to T), and Cytosine pairs up with Guanine (C is to G). This is known as base pairing. However, when translating DNA to RNA their is a catch, there is no thymine in RNA. Instead there is Uracil. SO in RNA it would be like so: A is to U and C is to G. So when transcribing DNA to mRNA it would be like this. I will give an example: DNA: TGA GTC AAT GGC. However with RNA it would be like this, using the same example I just showed you: ACU CAG UUA CCG. Do you see I it now? Basically when transcribing to RNA you use the opposite of all of the original copy except use Uracil instead of Thmine.
7 0
3 years ago
2.) If you wanted to express a large eukaryotic gene in a prokaryotic organism, what steps would be necessary? Describe your pro
alina1380 [7]

Answer:

Explanation:

The eukaryotic genes of interest can be expressed in the prokaryotic genome or plasmid vector. The following are the steps used for the purpose of expression of eukaryotic genes in the prokaryotic genome.

1. Amplification of the target gene of interest from the eukaryotic genome by PCR or polymerase chain reaction.

2. The selection of the plasmid and digestion of the plasmid DNA with the restriction enzyme.

3. Ligation of the amplified DNA fragment and the plasmid.

4. Introduction of the ligated plasmid into the prokaryotic host organism.

5 0
3 years ago
Please help!!! I was sick when I got this for homework so I have no clue.
den301095 [7]

Answer:

Number 3 is “dark”

Explanation:

After the Industrail Revolution, there was a large growth in dark peppered moth population.

6 0
3 years ago
Other questions:
  • List four types of fossils that can be used to provide indirect evidence of organisms
    11·2 answers
  • Viruses are parasitic, in that they require a host cell in order to go through the process of reproduction. When the influenza v
    13·2 answers
  • In two paragraphs explain how our planet's environment and living things affected each other to shape the history of life on ear
    7·1 answer
  • What is a difference between prokaryotic and eukaryotic cells?
    14·2 answers
  • Need help on this !!
    14·1 answer
  • 1-Qual das alternativas está correta? A)Mortalidade - Informam a ocorrência e distribuição das causas de nascidos no perfil da m
    13·1 answer
  • Which of the following is not a useful scientific field for providing evidence of evolution?
    14·1 answer
  • The Solar System is made up of gas, dust, and then was put together in a unique way. For planet Earth, all of the objects around
    10·1 answer
  • 2. What is made inside of bones that is carried throughout the circulatory system?
    6·2 answers
  • 5. Should the discovery of alcohol or drug addiction in a pregnant woman lead to
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!